3806856 Cylinder Head Core | Genuine Volvo Penta Part

🔧 Product Description

Core deposit for a cylinder head, in the Engine group. It is the refundable charge raised against the old cylinder head when the exchange unit is bought, and it comes back once the worn cylinder head is returned. The line itself is an accounting entry rather than a part, so nothing ships against it on its own. Under Volvo Penta's core numbering the exchange unit it belongs to takes part number 3803856, which is the number to quote for the component itself. It is the only cylinder head core in this run, so there is nothing here to confuse it with. The 20.412 kg published against the line is the figure to plan the return carriage of the old cylinder head around, since the deposit itself ships nothing.

⚙️ Key Features

• Core deposit line, not a cylinder head you can fit
• Belongs with the exchange unit, part number 3803856
• Refunded when the old cylinder head is returned
• The only cylinder head core in this run
• Engine group

🔌 Function

As a line item it carries the refundable core charge on the exchange; the head itself closes the top of the cylinders and carries the valves, their seats and guides, the injector seats and the coolant passages that keep the combustion faces cool.

⚠️ Common Signs of Failure

• This is a deposit line and has nothing to fail in itself; the signs below are what normally condemns the cylinder head being exchanged
• Coolant going somewhere with no external leak, and the engine running hot
• White smoke from the exhaust once warm, or oil turned creamy at the filler
• Bubbling or pressure building in the header tank while the engine runs
• Compression down on one or two cylinders, with cracking or a burnt face found on strip-down

🛠️ Service Notes

• The charge is refunded when the worn cylinder head is returned, so keep the old unit and send it back rather than scrapping it
• Ordering this number on its own supplies no part - it goes on the order beside the exchange unit, part number 3803856
• The head gasket and the head bolts are renewal items - fit new ones, pull the head down in the specified sequence, and have the block face checked for flatness before the exchange head goes on

📦 Condition

• Refundable core deposit - not a physical part